1. Some people like to... online games 2. Some decisions are difficul to... 3. the fact teenagers watch too much television causes .. for many teachers 4. My parent alway encourage me to express my... about what is happening in my country 5. Doing lots of exercise can provide a lot of health.... 6.Using a mobile phone can have positive and negative... on people 's live 7. scientists are..... research into how important it is for stduent to have regular tests Dùng các từ: benefits, concern , doing, effects, get, make, opinion, take part in để điền vào chỗ trống Giúp m với ạ